_message&lowbar;name_ | The top-level Protobuf message name, in the format `<package>.<message name>`. For example, `billing.Batch`. For more detail, see [Top-level message](#top-level-message).
_schema&lowbar;file&lowbar;path_ | The absolute path to a file containing the [`FileDescriptorSet`](#filedescriptorset).
_inline&lowbar;schema_ | A string representing the [`FileDescriptorSet`](#filedescriptorset).
